Man's interest in character is founded on an intensely practical need. In whatsoever relationship we deal with our fellows, we base our intercourse largely on our understanding of their characters. . . . Because the feelings are in part mirrored on the face and body, the experience of mankind has become crystallized in beliefs, opinions, and systems of character reading which are based on physiognomy, shape of head, lines of hand, gait, and even the method of dress and the handwriting. . . . A few of the methods used have become organized into specialties, such as the study of the head.

Introduction, The Foundations of Personality